Birds season could hinge on Jamaal Jackson

Even before Mike McGlynn's injury, the Eagles were concerned enough about the center position to endorse Jamaal Jackson's rushed rehab from an anterior cruciate ligament injury sustained late last December.
Typically it takes a player two years to feel and play like his old self after a torn ACL. Jackson is probably about 50 percent of what he was before the injury.
That said, half of Jamaal Jackson could be better than what the Eagles have. No one is experienced with the line calls, and it shows in the play of the line.
It starts up front with the Eagles.
It might not start at all without Jackson, who wants to play in the preseason finale this week, and has vowed to be ready for the regular season opener.